5,415 research outputs found
Music in painting : painting in music / Valerie Ross and Ayse Guler
No full textThe transformative qualities of music and painting are inspirational. The collaborative voices of artistes from different disciplines and backgrounds transcend geographic and cultural distances enabling transcultural creativities as an outcome of interdisciplinary research-practice. This interdisciplinary project represents a unique collaborative effort between a composer and an artist in creating, visualizing and translating sound. It extrapolates the process and product of sonic design in response to a set of watercolor paintings drawn by Turkish painter and academic, Ayse Guler who was inspired by the music of Valerie Ross. The striking visual and interpretation of sound through Zen philosophy, a/r/tography and novel watercolour painting techniques adopted in the paintings have triggered a musical response from the composer who in-turn transmogrified the paintings back into music. The composer aimed to (re)interpret and translate the colours, shapes and emotions of the paintings as sonic realms in the performative world where sound-forms, sights and senses meld into a smorgasbord of artistic communication through a new electroacoustic piece entitled ‘Sixty-Three
Dimensions’
Radiocarbon dating of archaeological and geographical samples and their evaluation
No full textVarious samples obtained from different places in Anatolia were dated using radiocarbon technique. The results of unknown aged archaeological samples were chronogically evaluated. The wood and charcoal samples taken from archaic mine galleries showed that development of mining dates back to 2000 B.C. in Anatolia, Shells found around Konya plain proved that this place was occupied by a lake and the dates suggest that the lake level attained its maximum 20.000 years ago, and it possibly dried 14.000 years ago,Différents échantillons obtenus de divers sites d'Anatolie ont été datés par la technique du radio- carbone. Les résultats concernant des échantillons archéologiques d'âge inconnu sont évalués chronologiquement. Des échantillons de bois et de charbon pris dans des galeries de mines antiques montrent que le développement de l'art des mines remonte vers 2000 B.C. en Anatolie. Des coquilles découvertes autour de la plaine de Konya prouvent que cette zone était occupée par un lac et les dates suggèrent que le niveau de ce lac atteignit son maximum il y a 20,000 ans, et il s'assécha peut-être il y a 14.000 ans.Ergin M., Kis M., Guler R. Radiocarbon dating of archaeological and geographical samples and their evaluation. In: Revue d'Archéométrie, n°4, 1980. pp. 73-76
Butyrate: A potential mediator of obesity and microbiome via different mechanisms of actions
No full textButyrate, a short-chain fatty acid, is a crucial product of gut microbial fermentation with significant implications for various metabolic and physiological processes. Dietary sources of butyrate are limited, primarily derived from the fermentation of dietary fibers by butyrate-producing gut bacteria. Butyrate exerts its effects primarily as a histone deacetylase (HDAC) inhibitor and through signaling pathways involving G protein-coupled receptors (GPCRs). Its diverse benefits include promoting gut health, enhancing energy metabolism, and potentially alleviating complications associated with obesity. However, the exact role of butyrate in obesity is still under investigation, with a limited number of human trials necessitating further research to determine its efficacy and safety profile. Moreover, butyrate impact on the gut-brain axis and its modulation of microbiome effect on behavior highlight its broader importance in regulating host physiology. A thorough understanding of the metabolic pathways and mechanisms of butyrate is essential for developing targeted interventions for metabolic disorders. Continued research is crucial to fully realize its therapeutic potential and optimize its clinical applications in human health. In summary, this review illuminates the multifaceted role of butyrate as a potential mediator of obesity and related metabolic changes
Using Generalizability Theory to Examine Different Concept Map Scoring Methods
No full textConclusions and Recommendations: According to the results of this study, Phi coefficient was higher in the concept map study in which the holistic scoring method was used. In this study, tasks represented a significant variance component for both scoring methods. This may be interpreted to mean that the levels of difficulty for the tasks differed according to the students using both methods. In each of the scoring methods, the variance related to the raters was found to be zero, which may result in the interpretation that raters scored the maps consistently.Findings and Results: In focusing on the size of the variance estimates according to holistic scoring methods, while the student component (objects of measurement) accounts for one of the largest percentages of th
Private R&D and Second Sourcing in Procurement: An Experimental Study
No full textThis study focuses on two topics in government procurement problems: second sourcing, and private research and development investment procurement. A simple theoretical framework is developed to analyze the likely effects on private R&D and procurement prices of recent proposals regarding competition in procurement and the associated data0rights policy. The framework is also used to demonstrate a major flaw in the current methodology used in the evaluation of the benefits of sourcing. IN procurement environments where private R&D is an important factor and potential sellers have commercial markets which may be adversely affected, second sourcing may reduce competition in the initial procurement stage. Experimental methods are used to test for the existence of the effect
A necessary condition for generic rigidity of bar-and-joint frameworks in -space
No full textA graph is -sparse if each subset with induces at most edges in . Maxwell showed in
1864 that a necessary condition for a generic bar-and-joint framework with at
least vertices to be rigid in is that should have a
-sparse subgraph with edges. This necessary
condition is also sufficient when but not when . Cheng and
Sitharam strengthened Maxwell's condition by showing that every maximal
-sparse subgraph of should have edges when
. We extend their result to all .Comment: There was an error in the proof of Theorem 3.3(b) in version 1 of
this paper. A weaker statement was proved in version 2 and then used to
derive the main result Theorem 4.1 when . The proof technique was
subsequently refined in collaboration with Hakan Guler to extend this result
to all in Theorem 3.3 of version
Rotational Hypersurfaces Satisfying ∆^I R=AR in the Four-Dimensional Euclidean Space
No full textIn this study, rotational hypersurfaces in the 4-dimensional Euclidean space are discussed. Some relations of curvatures of hypersurfaces are given, such as the mean, Gaussian, and their minimality and flatness. In addition, Laplace-Beltrami operator has been defined for 4-dimensional hypersurfaces depending on the first fundamental form. Moreover, it is shown that each element of the 4 x 4 order matrix A, which satisfies the condition Delta R-I = AR, is zero, that is, the rotational hypersurface R is minimal
On Suborbital Graphs of the Congruence Subgroup r 0(N)
No full textIn this paper we examine some properties of suborbital graphs for the congruence subgroup r 0 (N) . Then we give necessary and sufficient conditions for graphs to have triangels
Topics in Structured Convex Optimization and Nonlinear Programming
No full textA convex programming problem in a conic form is a minimization of a linear function over the intersection of an affine space and a convex cone . In this thesis, we study two broad subclasses of convex programming problems with having special structure. We treat \emph{homogeneous} programming problems. These are convex programming problems in which is a homogeneous cone. These problems are more general than well-studied semi-definite or symmetric programming problems. We explain the key steps of Vinberg's classification of homogeneous cones in terms of so-called -algebras, and discuss some properties of a -algebraic barrier associated with . We also consider two alternative constructions of homogeneous cones by means of Siegel domains, and provide a new expression for an \emph{optimal} dual self-concordant barrier for using the dual construction of Rothaus. A self-concordant barrier is \emph{optimal} if it has the smallest parameter among all self-concordant barriers for . It is important for a barrier to have the smallest possible parameter , since enters directly into the complexity estimates for interior-point methods. We give a simplified self-concordance proof for the primal barrier of Guler and Tuncel, and consider several examples. The class of \emph{hyperbolic} programming problems is discussed in the thesis as well. These are conic problems with being a hyperbolicity cone corresponding to some homogeneous hyperbolic polynomial. We provide descriptions of hyperbolicity cones and their derivative relaxations. We discuss the three-dimensional Lax's theorem, which states that any hyperbolic polynomial of three variables can be written as a determinant of a linear combination of symmetric matrices. This is a very important theorem since it implies semidefinite representability of any hyperbolicity cone in three dimensions. We show that the Lax's theorem is a powerful and unifying tool by applying it in the proofs of various important results in interior-point methods and convex analysis, and by providing some interesting connections with other branches of mathematics. Finally, the thesis deals with variational problems in quasi-Newton methods. We consider variational problems associated with popular DFP and BFGS updates, and obtain these updates in a very simple manner. Our approach is coordinate free; we eliminate symmetry constraints imposed on the updates by working directly in the space of symmetric matrices. We consider the dual problems. A novel feature of our work is that we construct several new variational problems whose optimal solutions coincide with quasi-Newton update matrices. These new variational problems may be useful in suggesting new quasi-Newton methods in the future
Obliteração pulpar em incisivo decíduo traumatizado
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências da Saúde. Programa de Pós-Graduação em Odontologia.Este estudo descritivo retrospectivo em incisivos centrais superiores decíduos traumatizados teve por objetivo, verificar a ocorrência de obliteração pulpar, o tempo decorrido entre o trauma e o desenvolvimento desta seqüela, a presença de alteração de cor da coroa bem como a freqüência de necrose pulpar secundária nos dentes obliterados, além de avaliar a existência de associação entre a obliteração e o sexo, a idade do paciente no momento do trauma dental, o tipo e a reincidência de trauma. Para isto, realizou-se uma pesquisa desenvolvida a partir dos dados clínicos e radiográficos dos prontuários de pacientes participantes do Programa de Atendimento ao Paciente Traumatizado da Universidade Federal de Santa Catarina, entre agosto de 1998 e agosto de 2007. Seguindo os critérios de elegibilidade, foram incluídos 112 dentes de 82 crianças. Destes, 60 (53,6%) apresentavam obliteração pulpar, sendo que em 58,3% dos casos esta foi diagnosticada em até 12 meses após o trauma. A associação entre alteração de cor da coroa e obliteração pulpar foi confirmada (p<0,001), e não houve casos de necrose pulpar secundária. Não se observou associação estatística entre as variáveis sexo e idade dos pacientes, bem como tipo e recorrência de trauma em relação a obliteração pulpar. Os resultados deste estudo permitem concluir que a ocorrência de obliteração pulpar em dentes decíduos traumatizados é alta e a proservação clínica e radiográfica periódica é a melhor conduta para esta seqüela
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